Kollag
固体润滑剂
🗣️ 情景例句
If you educate the public about dangerous diseases they can protect themselves, which will help to halt the spread.
如果你能教育公众如何来防治危险疾病，他们就能够保护好他们自己，从而阻止疾病的传播。
Know something of everything and everything of something.
既要有一般常识，又要有专业知识。
How many musicians are you bringing?
你打算带多少乐师来？